[Bot] Update inference types

[HuggingFaceInfra]

This PR updates the inference types. It has been generated by running:

# Generate Python code
pnpm run inference-codegen  # from @huggingface/tasks-gen

# Copy to this repository
cp -r ./huggingface.js/packages/tasks/.python_generated/* ./huggingface_hub/src/huggingface_hub/inference/_generated/types

# Clean things
make inference_update
make style

This PR was automatically created by the Update Inference Types workflow.

Make sure the changes are correct before merging.

---

Note

Low Risk
Primarily type-hint and docstring updates across generated inference clients/types; runtime behavior should be unchanged, with only minor risk of type-checking or doc rendering regressions.

Overview
Updates the sync and async InferenceClient method signatures to consistently use Optional[...] (and a few Union[...]) instead of T | None for many optional parameters (e.g., top_k, generation params, thresholds).

Regenerates the auto-generated inference types/* dataclasses to match the same typing convention (and fixes a few typing imports), plus small docstring cleanups/duplication adjustments in several task methods.

^{Reviewed by Cursor Bugbot for commit d9562b9. Bugbot is set up for automated code reviews on this repo. Configure here.}

[bot-ci-comment]

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